public void CreatePatch() { var mapper = new ApiCurrencyRateModelMapper(); var model = new ApiCurrencyRateRequestModel(); model.SetProperties(1m, DateTime.Parse("1/1/1987 12:00:00 AM"), 1m, "A", DateTime.Parse("1/1/1987 12:00:00 AM"), "A"); JsonPatchDocument <ApiCurrencyRateRequestModel> patch = mapper.CreatePatch(model); var response = new ApiCurrencyRateRequestModel(); patch.ApplyTo(response); response.AverageRate.Should().Be(1m); response.CurrencyRateDate.Should().Be(DateTime.Parse("1/1/1987 12:00:00 AM")); response.EndOfDayRate.Should().Be(1m); response.FromCurrencyCode.Should().Be("A"); response.ModifiedDate.Should().Be(DateTime.Parse("1/1/1987 12:00:00 AM")); response.ToCurrencyCode.Should().Be("A"); }